X-ray microtomography (microCT) of the progression of sulfate attack of cement paste

S. R. Stock*, N. K. Naik, A. P. Wilkinson, K. E. Kurtis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

High-resolution X-ray computed tomography (i.e., microCT or microtomography) was used to study the sulfate attack of cylinders of Type I cement paste cast with water-cement (w/c) ratios of 0.45, 0.50 and 0.60. Damage levels in samples exposed to a Na2SO4 solution with 10,000 ppm sulfate ion concentration were qualitatively rated from 0 (no damage) to 4 (extreme damage) based upon visual examination of the samples' exteriors and microtomography of the samples' interiors. The greater the w/c ratio, the more rapid the onset of sulfate damage. The corners of the cylinders appeared to be particularly susceptible to spalling, and damage may have continued into the cement paste by formation of subsurface cracks.

Original languageEnglish (US)
Pages (from-to)1673-1675
Number of pages3
JournalCement and Concrete Research
Volume32
Issue number10
DOIs
StatePublished - Oct 2002

Keywords

  • Cement paste
  • MicroCT
  • Microtomography
  • Nondestructive evaluation
  • Sulfate attack
  • X-ray

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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